Intelligent radiation inspection instrument

Abstract

The invention belongs to the technical field of radiation inspection instruments, and particularly relates to an intelligent radiation inspection instrument. Comprising a power supply module, a radiation detection module, a communication module, a display screen unit and a camera unit, and the power supply module provides a working power supply for the radiation detection module, the communication module, the display screen unit and the camera unit. The camera unit and the display screen unit are connected with the radiation detection module through the communication module. According to the invention, the GM tube detector, the discrimination unit, the high-voltage unit, the processor, the state indication unit, the communication module, the display screen unit, the camera unit and the communication module are adopted, so that the problems of high power consumption and low detection sensitivity of an existing itinerant detector are solved; and the system has the functions of wireless communication, state indication, data display, camera shooting and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of radiation inspection instruments, and particularly relates to an intelligent radiation inspection instrument. Background Art

[0002] A radiation inspection instrument, the full name being an ionization radiation inspection instrument, generally uses a Nal(TI) crystal or a GM tube as a detector, and is then equipped with an electronic amplification circuit and an alarm indication device to form a radiation inspection instrument. However, most of the existing radiation inspection instruments have a single function, can only detect and give early warnings of radiation, and have the disadvantages of high power consumption and low detection sensitivity. Summary of the Invention

[0003] The purpose of the present invention is to provide an intelligent radiation inspection instrument, which solves the problems of high power consumption and low detection sensitivity of existing inspection instruments, and also has functions such as wireless communication, status indication, data display, and camera photography.

[0004] The technical solution of the present invention is as follows: An intelligent radiation inspection instrument includes a power supply module, a radiation detection module, a communication module, a display screen unit, and a camera unit. The power supply module provides working power for the radiation detection module, the communication module, the display screen unit, and the camera unit. The camera unit and the display screen unit are both connected to the radiation detection module through the communication module.

[0005] The radiation detection module includes a GM tube detector, a discrimination unit, a high-voltage unit, a processor, and a status indication unit. The output end of the GM tube detector is connected to the input end of the discrimination unit, the output end of the discrimination unit is connected to the input end of the processor, the processor provides a working voltage for the GM detector through the high-voltage unit, and the status indication unit is connected to the processor.

[0006] The radiation signal is detected and measured by the GM tube detector. The signal detected by the GM tube detector is discriminated by the discrimination unit to form a square wave and sent to the IO port of the processor. The processor performs counting and smoothing and then fits it into a dose rate. The processor performs wireless data transmission of data such as the dose rate through the communication module; the processor takes pictures of the surrounding environment through the camera unit, and the processor displays historical data charts, calibration factor modification, or source response inspection data records through the display screen unit; the processor displays the device operation status, alarm status, or sound and light indicator lights through the status indication unit.

[0007] The GM tube detector described above selects an energy-compensated GM tube, with an energy range of 33 keV to 3 MeV, and errors: ≤40% @ 33 keV to 80 MeV, ≤30% @ 80 keV to 3 MeV; γ range: 0.1 μSv / h to 100 mSv / h; sensitivity response: ~1.1 cps / μSv / h @ Cs137; starting voltage: 320 V to 370 V, operating voltage 450 V; operating temperature -40°C to 50°C.

[0008] The discrimination unit described above uses a GM tube signal discrimination circuit to achieve GM tube signal discrimination. The voltage pulse signal after processing the γ radiation signal is discriminated by the discrimination circuit to form a square wave and sent to the IO interface of the processor, and then the processor performs counting and smoothing processing and fits it into a dose rate.

[0009] The high-voltage unit described above uses a high-voltage module with adjustable high-voltage output.

[0010] The processor described above selects a low-power MCU, with a low operating voltage: 1.8 - 3.6 V; having the functions of 32-bit addition and subtraction instructions, 16-bit multiplication and division instructions, 32-bit multiplication and division operations, and 32-bit arithmetic comparison instructions; including three low-power modes, namely active mode: 400 μA (1 MHz); standby mode: 1.3 μA; shutdown mode: 0.22 μA; having the advantage of fast response speed, only taking 6 μs from standby wake-up to normal operation; also including 128 KB Flash and 12 KB RAM.

[0011] The power supply module described above includes a lithium battery charge and discharge management unit, a wireless charging unit, and a lithium battery. The lithium battery charge and discharge management unit and the wireless charging unit are both connected to the lithium battery. The lithium battery charge and discharge management unit uses a constant voltage and constant current linear charging voltage fixed at 4.2 V, and the charging current supports up to 800 mA at most. It also includes a lithium battery charge and discharge protection circuit, which automatically cuts off the battery power supply when the battery voltage is lower than 3.0 V. The wireless charging unit: uses the electromagnetic induction method. At a power supply voltage of 12 V, the receiving end can stably output a 4.2 V charging voltage, and the transmitting end of the circuit is provided with a circuit protection function.

[0012] The wireless charging unit described above includes a transmitting resonance part and a receiving coil part. The transmitting resonance part includes a power management, an oscillation source, and a power amplifier circuit. The receiving coil part includes an energy conversion, a charging battery, and a control circuit. The oscillator part selects a UC38428 / 3843 controller; the receiving coil part selects a BQ24002 lithium battery charging management chip, which can stably output a 4.2 V charging voltage and has a working voltage up to 13 V at most, suitable for wireless charging.

[0013] The communication module selects the Unisoc SOC chip to implement the 5-in-1 communication function, specifically including 5 communication functions: 5G, WiFi, GPS, BDS, and Bluetooth.

[0014] The beneficial effects of the present invention are as follows: By adopting a GM tube detector, a discrimination unit, a high-voltage unit, a processor, a status indication unit, a communication module, a display screen unit, a camera unit, and a communication module, the present invention not only solves the problems of high power consumption and low detection sensitivity of existing patrol instruments, but also has functions such as wireless communication, status indication, data display, and camera photography. Description of the Drawings

[0015] Figure 1 is a schematic diagram of an intelligent radiation patrol instrument provided by the present invention;

[0016] Figure 2 is a schematic diagram of the composition of the wireless charging unit in the present invention. Detailed Embodiments

[0017] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0018] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0019] An intelligent radiation patrol instrument detects and measures the energy of γ-rays and x-rays in nuclear radiation through a GM tube detector. Since the working voltage of the GM tube detector is several hundred volts, the working voltage of the GM tube detector needs to be obtained by boosting the voltage provided by the power supply module through a high-voltage unit. The signal detected by the GM tube detector is discriminated by the discrimination unit to form a square wave and sent to the IO port of the processor, and the processor performs counting and smoothing and then fits it into a dose rate.

[0020] The processor performs wireless data transmission through the communication module; the processor takes pictures of the surrounding environment through the camera unit, and when the detected radiation dose exceeds the standard, it can timely understand the on-site situation; the processor displays data such as historical data charts, calibration factor modification, or source response inspection data records through the display screen unit; the processor displays the device operation status, alarm status, or sound and light indicator lights through the status indication unit.

[0021] Such as Figure 1As shown in the figure, an intelligent radiation inspection instrument includes a power supply module, a radiation detection module, a communication module, a display unit, and a camera unit. The power supply module provides working power for the radiation detection module, the communication module, the display unit, and the camera unit. The camera unit and the display unit are both connected to the radiation detection module through the communication module;

[0022] The radiation detection module includes a GM tube detector, a discrimination unit, a high-voltage unit, a processor, and a status indication unit. The output end of the GM tube detector is connected to the input end of the discrimination unit, the output end of the discrimination unit is connected to the input end of the processor, the processor provides a working voltage for the GM detector through the high-voltage unit, and the status indication unit is connected to the processor.

[0023] The specific embodiments of the present invention are as follows: First, the radiation signal is detected and measured by the GM tube detector. The signal detected by the GM tube detector is discriminated by the discrimination unit and then formed into a square wave and sent to the IO port of the processor. The processor performs counting and smoothing and then fits it into a dose rate. The processor performs wireless data transmission on data such as the dose rate through the communication module; the processor takes pictures of the surrounding environment through the camera unit. When the detected radiation dose exceeds the standard, the on-site situation can be understood in time; the processor displays data such as historical data charts, calibration factor modification, or source response inspection data records through the display unit; the processor displays the device operation status, alarm status, or sound and light indicator lights through the status indication unit.

[0024] Regarding the device selection in the radiation detection module:

[0025] GM tube detector: An energy-compensated GM tube is selected, and all indicators meet the technical requirements; energy 33KeV - 3MeV, error: ≤40% @ 33KeV - 80MeV, ≤30% @ 80KeV - 3MeV; γ range: 0.1μSv / h - 100mSv / h; sensitivity response: ~1.1cps / uSv / h @ Cs137; starting voltage: 320V - 370V, working voltage 450V; working temperature -40°C - 50°C.

[0026] Discrimination unit: A GM tube signal discrimination circuit is adopted to realize the discrimination of GM tube signals. The voltage pulse signal after the γ radiation signal is processed is discriminated by the discrimination circuit and then formed into a square wave and sent to the IO interface of the processor. The processor then performs counting and smoothing processing and fits it into a dose rate. The discrimination circuit is a relatively mature technology for those skilled in the art. For details, reference can be made to the invention with the publication number CN212008952U and the name of the hybrid pulse signal discrimination circuit and counting circuit.

[0027] High-voltage unit: It uses a high-voltage module with adjustable high-voltage output (300 - 800V, 450V is recommended for GM tubes). Since the high-voltage module is a relatively mature technology for those skilled in the art, it can be selected according to the actual situation, and the present invention does not make specific limitations.

[0028] Status indication unit: It indicates the device operation status, alarm status, and audible and visual indications, etc.

[0029] Processor: A low-power MCU is selected, with a low operating voltage of 1.8 - 3.6V; it has the functions of 32-bit addition and subtraction instructions, 16-bit multiplication and division instructions, 32-bit multiplication and division operations, and 32-bit arithmetic comparison instructions; it includes three low-power modes, namely the active mode: 400 μA (1 MHz); the standby mode: 1.3 μA; the shutdown mode: 0.22 μA; it has the advantage of fast response speed, only taking 6 μs to wake up from standby to normal operation; it also includes 128KB Flash and 12KB RAM.

[0030] Regarding the device selection in the power module:

[0031] Lithium battery charge and discharge management unit: It uses a linear charging voltage with constant voltage and constant current fixed at 4.2V, with a maximum charging current of 800 mA, and its own standby current consumption is only 2 μA. It also includes a lithium battery charge and discharge protection circuit, which automatically cuts off the battery power supply when the battery voltage is lower than 3.0V, so that the battery will not be over-discharged to reduce performance or be damaged.

[0032] Wireless charging unit: It uses the electromagnetic induction method, fully combining magnetic coupling technology and switch power supply technology. At a power supply voltage of 12V, the receiving end can stably output a charging voltage of 4.2V, and the transmitting end of the circuit is provided with a circuit protection function, which can effectively prevent problems such as the power MOS tube from being broken down and short-circuited. For details, please refer to Figure 2 , Figure 2 which is the composition schematic diagram of the wireless charging unit in the present invention. The entire wireless charging unit includes a transmitting resonance part and a receiving coil part. The transmitting resonance part includes a power management, an oscillation source, and a power amplifier circuit. The receiving coil part includes an energy conversion, a charging battery, and a control circuit. The oscillator part selects a UC38428 / 3843 controller, which has the advantages of low price, simple external circuit, and built-in lithium battery circuit protection function; the receiving coil part selects a BQ24002 lithium battery charging management chip, which can stably output a charging voltage of 4.2V, and its working voltage can reach up to 13V, suitable for wireless charging.

[0033] Lithium battery: It converts the output voltage of the lithium battery from 3.4V - 4.2V into three stable voltages of 3.3V, respectively supplying power to the radiation detection module, the communication module, and the display unit.

[0034] Regarding the device selection within the communication module:

[0035] Select the Unisoc SOC chip solution to achieve 5-in-1 communication functions, specifically including 5G, WiFi, GPS, BDS, and Bluetooth, a total of 5 communication functions. This chip is a high-performance 5G Android intelligent module, adopting the advanced 6nm process technology SoC T820, including four-core A76 and four-core A55, with a maximum main frequency of up to 2.7Ghz, and a computing unit with a computing power of up to 8TOPS NPU. The board is equipped with a memory unit of up to 8GB Ram + 256GB Rom, supports 4K H.265 / H.264 video encoding and decoding, and is equipped with an operating system above Android 13, with powerful performance and rich functions.

[0036] The module size specification is only 43mm * 55mm * 2.9mm, suitable for various products with higher requirements for structural size and power consumption.

[0037] Regarding the display unit selection: Select the BOE 6.8-inch liquid crystal display, with mature technology and stable performance.

[0038] Regarding the camera unit selection: Select the Oufeiguang camera module, which is widely used in mobile phones and computers.

[0039] Among them, the GM tube detector adopts an energy-compensated GM tube detector. The energy-compensated GM detector is a gas detector used to detect and measure the energy of γ-rays and x-rays in nuclear radiation, and has the characteristic of being able to compensate for the energy response to provide accurate energy measurement. Its principle is to place an electron buffer layer on the tube wall and isolate it from the gas amplification layer.

[0040] Among them, the communication module is connected to the low-power processor through the UART serial port. The UART serial port is mainly used to communicate with the communication module to achieve the effect that data such as dose information can be remotely transmitted to a preset terminal.

[0041] Among them, the communication module uses a preset chip to achieve 5 communication functions of 5G, WiFi, GPS, BDS, and Bluetooth. The communication module has been explained in detail in the above communication model device selection, so it will not be elaborated further.

[0042] Among them, the power supply module includes a lithium battery, a wireless charging unit, and a lithium battery charge and discharge management unit. The wireless charging unit is used to charge the lithium battery, and the lithium battery charge and discharge management unit is used to manage the charging and discharging of the lithium battery. The power supply module has been explained in detail in the above power supply module device selection, so it will not be elaborated further.

[0043] Among them, the display screen unit adopts a liquid crystal display screen.

[0044] Among them, the inspection instrument includes an alarm unit, and the alarm unit gives an alarm through an audible and visual alarm device and a vibration component. The vibration component is selected as a linear motor to provide an easily perceivable vibration feedback. The specific model of the audible and visual alarm device can be selected according to the actual situation, and the present invention does not make a limitation.

[0045] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An intelligent radiation inspection instrument, characterized in that: It includes a power module, a radiation detection module, a communication module, a display screen unit and a camera unit. The power module provides working power for the radiation detection module, the communication module, the display screen unit and the camera unit. The camera unit and the display screen unit are connected to the radiation detection module through the communication module.

2. The intelligent radiation inspection instrument according to claim 1, characterized in that: The radiation detection module includes a GM tube detector, a discrimination unit, a high-voltage unit, a processor and a status indication unit. The output end of the GM tube detector is connected to the input end of the discrimination unit, the output end of the discrimination unit is connected to the input end of the processor, the processor provides an operating voltage for the GM detector through the high-voltage unit, and the status indication unit is connected to the processor.

3. The intelligent radiation inspection instrument according to claim 2, characterized in that: The radiation signal is detected and measured by the GM tube detector. The signal detected by the GM tube detector is identified by the identification unit to form a square wave and sent to the IO port of the processor. The processor counts and smoothes it and fits it into the dose rate. The processor transmits the dose rate and other data wirelessly through the communication module. The processor shoots the surrounding environment through the camera unit. The processor displays the historical data chart, calibration factor modification or source response inspection data record data through the display unit. The processor displays the equipment operation status, alarm status or sound and light indicator light through the status indication unit.

4. The intelligent radiation inspection instrument according to claim 2, characterized in that: The GM tube detector uses an energy-compensated GM tube with an energy of 33KeV to 3MeV, an error of ≤40% @33KeV to 80MeV, ≤30% @80KeV to 3MeV; a γ range of 0.1μSv / h to 100mSv / h; a sensitivity response of ~1.1cps / uSv / h@Cs137; a starting voltage of 320V to 370V, an operating voltage of 450V; and an operating temperature of -40°C to 50°C.

5. The intelligent radiation inspection instrument according to claim 2, characterized in that: The discrimination unit adopts a GM tube signal discrimination circuit to realize GM tube signal discrimination. The voltage pulse signal of the processed γ radiation signal is discriminated by the discrimination circuit to form a square wave and sent to the IO interface of the processor. The processor then counts and smoothes it and fits it into a dose rate.

6. The intelligent radiation inspection instrument according to claim 2, characterized in that: The high-voltage unit adopts a high-voltage module, and the high-voltage output is adjustable.

7. The intelligent radiation inspection instrument according to claim 2, characterized in that: The processor uses a low-power MCU with a low operating voltage of 1.8-3.6V; it has the functions of 32-bit addition and subtraction instructions, 16-bit multiplication and division instructions, 32-bit multiplication and division operations, and 32-bit arithmetic comparison instructions; it includes three low-power modes, namely, active mode: 400μA; standby mode: 1.3μA; and off mode: 0.22μA; it has the advantage of fast response speed, and it only takes 6μs to wake up from standby to normal operation; it also includes 128KBFlash and 12KB RAM.

8. The intelligent radiation inspection instrument according to claim 1, characterized in that: The power module includes a lithium battery charging and discharging management unit, a wireless charging unit and a lithium battery. The lithium battery charging and discharging management unit and the wireless charging unit are both connected to the lithium battery. The lithium battery charging and discharging management unit adopts a constant voltage and constant current linear charging voltage fixed at 4.2V, and the maximum charging current supports 800mA. It also includes a lithium battery charging and discharging protection circuit, which automatically cuts off the battery power supply when the battery voltage is lower than 3.0V. The wireless charging unit: adopts electromagnetic induction. When the power supply voltage is 12V, the receiving end can stably output a 4.2V charging voltage, and the circuit transmitting end is provided with a circuit protection function.

9. The intelligent radiation inspection instrument according to claim 8, characterized in that: The wireless charging unit includes a transmitting resonance part and a receiving coil part. The transmitting resonance part includes power management, oscillation source and power amplifier circuit, and the receiving coil part includes conversion energy, rechargeable battery and control circuit. The oscillator part uses UC38428 / 3843 controller; the receiving coil part uses BQ24002 lithium battery charging management chip, which can stably output 4.2V charging voltage, and the working voltage can reach up to 13V, which is suitable for wireless charging.

10. The intelligent radiation inspection instrument according to claim 1, characterized in that: The communication module uses the Unisoc SOC chip to achieve 5-in-1 communication functions, including 5G, WiFi, GPS, BDS and BlueTooth.

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